A number of us have good effective installations and possibly they are all different, some might be more efficient than others...For what it's worth I have used 2 backstay insulators with the lower as close to the deck as possible to minimise the length of GTO15 connecting it to the SGC230 ATU. Some folk have had very good results using a manual atu and hoisting a wire to the top of the mast...Others have cut dipoles for ,say, 20m and have cracking signals. For a ground on previous boat I used 2 plates and tied in ss fuel tank and the engine; in current boat I've no ground plates and have just used ss water tank and tied in the engine and can extend this to a keel bolt although that isn't necessary since it works well enough as it is. I've used 3" copper tape throughout the ground system - something to do with RF currents preferring large surface area - I think it has a specific name which someone out there will remind me...xxxxx effect? I also use a number of ferrites but still have a problem with the AutoHelm, but I can live with that. Battery drain can be a problem so as a matter og "good" practice I rarely Tx at more than 20/30W. Good idea to have a small digital VoltMeter aboard for fault finding, etc.